Orthodox calendar 2021

Notes

1. How Easter is calculated
2. Orthodox feasts: immovable and movable
3. Days of the remembrance of the departed
4. Orthodox fast

1. Easter is calculated using Gauss formula. a = [(19 * [Y / 19] + 15) / 30], where Y - year, [] - residue of division;
   b = [(2 * [Y / 4] + 4 * [Y / 7] + 6 * a + 6) / 7];
   If (a + b) > 10 then Easter is (a + b - 9) of April (old calendar) else (22 + a + b) of March (old calendar). Thus the date of Easter can be from 22.03 to 25.04 (old calendar) or from 04.04 to 08.05 (new calendar).
   
   
2. Feasts are set off with red color.
   Immovable feasts:
   07.01 - Nativity of Christ (12 great feasts)
   14.01 - Circumcision of Christ (great feast)
   19.01 - Theophany. Baptism of Christ (12 great feasts)
   15.02 - Presentation of Christ (12 great feasts)
   07.04 - Annunciation (12 great feasts)
   21.05 - John the Theologian
   22.05 - St. Nicolas the Miracle-Worker
   07.07 - Nativity of St. John the Forerunner (great feast)
   12.07 - Apostles Peter and Paul (great feast)
   19.08 - Transfiguration of Jesus Christ (12 great feasts)
   28.08 - Dormition of the Theotokos (12 great feasts)
   11.09 - Beheading of St. John the Forerunner (great feast)
   21.09 - Nativity of the Theotokos (12 great feasts)
   27.09 - Elevation of the Holy Cross (12 great feasts)
   09.10 - John the Theologian
   14.10 - Protection of the Theotokos (great feast)
   04.12 - Presentation of the Theotokos (12 great feasts)
   19.12 - St. Nicolas the Miracle-Worker
   
   
   Movable feasts:
   07.02.2021 - Synaxis of new Russian martyrs
   14.02.2021 - Sunday of Zaccheus
   21.02.2021 - Sunday of the Publican and Pharisee
   28.02.2021 - Sunday of the Prodigal Son
   07.03.2021 - Sunday of the Last Judgment
   14.03.2021 - Sunday of Forgiveness. Expulsion of Adam and Eve from Paradise
   21.03.2021 - Sunday of Orthodoxy
   28.03.2021 - Sunday of St. Gregory Palamas
   04.04.2021 - Sunday of the Holy Cross
   11.04.2021 - Sunday of St. John Climacus
   18.04.2021 - Sunday of St. Mary of Egypt
   24.04.2021 - Lazarus Saturday
   25.04.2021 - Palm Sunday (12 great feasts)
   26.04.2021 - Holy Monday
   27.04.2021 - Holy Tuesday
   28.04.2021 - Holy Wednesday
   29.04.2021 - Holy Thursday. Last Supper
   30.04.2021 - Holy Friday. Crucifixion of Christ
   01.05.2021 - Holy Saturday. Christ's descent into Hades
   02.05.2021 - Resurrection of the Lord. Pascha
   09.05.2021 - Sunday of St. Thomas. Antipascha
   16.05.2021 - Sunday of Myrrh-bearing Women
   23.05.2021 - Sunday of the Paralytic
   30.05.2021 - Sunday of the Samaritan Woman
   06.06.2021 - Sunday of the Blind Man
   10.06.2021 - Ascension of Christ (12 great feasts)
   13.06.2021 - Sunday of the Fathers of the First Ecumenical Council
   20.06.2021 - Pentecost (12 great feasts)
   21.06.2021 - Day of the Holy Spirit
   27.06.2021 - Sunday of all Saints
   04.07.2021 - Sunday of all Russian Saints
   
   
3. Days of the remembrance of the departed are set off in back color.
   06.03.2021 - Paternal Saturday
   27.03.2021 - Paternal Saturday
   03.04.2021 - Paternal Saturday
   10.04.2021 - Paternal Saturday
   11.05.2021 - Day of Rejoicing
   19.06.2021 - Paternal Saturday
   09.05 - Remembrance of the departed soldiers
   06.11.2021 - Demetrius (Parental) Saturday
   
   
4. Fast days are set off in background colors.
   15.03.2021 - 01.05.2021 - the Great Lent
   28.06.2021 - 11.07.2021 - the Apostles' Fast
   14.08 - 27.08 - the Dormition Fast
   28.12 - 06.01 - the Nativity Fast
   
   

   Meat is excluded

   Fast

   Strict fast